[ProAudio] DVD Dubbing Problem

[Steve Maki]

DVCam & miniDV uses uncompressed 16/48 PCM audio encoding. But the NTSC 
video (480/720i) is lossy, similar to MPEG2 encoding.

-Steve Maki

On 05/22/25 2:05 PM, Bob Katz via ProAudio wrote:
>
> If I recall, mini-dv was a medium dedicated to Sony's lossy coded 
> format. If I'm right then the so-called "16 bit 48 kHz" files are 
> lossy encoded. The lossy encoded wordlength in the file is apparently 
> 16 bit but when decoded it will expand to 18 bits in linear pcm format 
> (formerly lossy coded) or more.
>
> And if I'm right then David Josephson's point about finding the 
> original player makes sense and you have to play it from the original 
> software. I suggest having a bit-scope on the digital output to sense 
> the output wordlength coming from the decoder. You could do that by 
> playing the dig out (SPDIF) into a good DAW and run a plugin called 
> "bitter" on the bitstream.
>
> Bob
>
>
> On 5/19/25 12:40 PM, David Josephson via ProAudio wrote:
>> Jim, do you still have the miniDV player? What kind of digital output does it have? Are you sure the DVD copies are bit-for-bit?
>>
>> David J
>>
>>> On Aug 31, 2024, at 19:45, Jim Brown via ProAudio<proaudio at bach.pgm.com> wrote:
>>>
>>> I'm in the process of dubbing music performance with world class players I recorded 20-25 years ago using a Canon XL1 writing to MiniDV. The audio is 16-bit 48 kHz, I recorded acoustic music with very good mics. The XL1 has pretty good glass, well above consumer grade.
>>>
>>> I've successfully managed to write DVDs with FireWire between a semi-pro player and a decent consumer DVD recorder. Now that I have the DVDs, I'm looking for a method to make bit-for-bit copies of them. I have no rights management to deal with. I need 3-5 copies of each program. My goal is not add a generation of data compression, without the need to make a transfer from the master for for each copy.
>>>
>>> I've found a review of a half-dozen or so Windows programs that seem to do it, but I don't trust the reviewer to know about data compression and generations.
>>>
>>> Any advice? Places to look?
>>>
>>> Thank, Jim Brown
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> -- 
> If you want good sound on your album, come to Bob Katz 407-831-0233 
> DIGITAL DOMAIN MASTERING STUDIO Author: *Mastering Audio* Digital 
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